1.1 创建表: CREATE TABLE `test_tb` ( `id` int(10) unsigned NOT NULL auto_increment COMMENT ‘主键自增’, `name` char(30) default NULL COMMENT ‘姓名’, `address` char(60) default NULL COMMENT ‘地址’, `country` char(200) default NULL COMMENT ‘国家’, PRIMARY KEY (`id`) ) ENG...
: test1 Create Table: CREATE TABLE `test1` ( `id` int(11) NOT NULL AUTO_INCREMENT, `age` int(11) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `uni_age` (`age`) ) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8 1 row in set (0.00 sec) 主库上进行replace之后,返回值是2...
SQL指南-IN IN IN 运算符可用于如果你知道一列你所想返回的精确值。 SELECT column_name FROM table_nameWHERE column_name IN (value1,value2,..) --- 原始表 (用于示例) --- 示例1 使用下面的SQL语显示LastName 等于"Hansen" 或者"Pettersen"的人 : SELECT * FROM Persons WHERE LastName IN ('Hans...
临时表 replace in sql server 在写数据库命令语句时,我们经常会建一个测试表来试验自己写的语句是否正确,这里可以建一个临时表,用完之后自动删除很方便。顺便也学学临时表的用法。 create table #test ( idintidentity(1,1) notnull, n varchar(50) ) select*from #test insert into #test values('sun24'...
(1) WAITING FOR THIS LOCK TO BE GRANTED:RECORD LOCKS space id 24 page no 4 n bits 80 index idx_a of table `test`.`ix` trx id 1866 lock_mode X locks gap before rec insert intention waiting*** (2) TRANSACTION:TRANSACTION 1865, ACTIVE 19 sec insertingmysql tables in use 1, locked...
Create Table: CREATE TABLE `t_replaceinto` ( `id` int(11) NOT NULL AUTO_INCREMENT, `c` int(11) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `c` (`c`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 1 row in set (0.00 sec) ...
确保你的 SQL 语句中 REPLACE 函数的用法是正确的。基本语法如下: REPLACE(string, search_string, replacement_string) 1. 示例:如果你想将列column_name中的分号替换为空字符串,则可以这样写: SELECT REPLACE(column_name, ';', '') AS new_column FROM your_table; ...
比如用户一个在vivo官网下单买了1台X50手机和1台X30耳机,那么下单后,首先根据用户收货地址确定发货仓库,然后从该仓库里面分别减去一个X50库存和一个X30库存。分析死锁sql之前,先看下商品库存表的定义(为方便理解,只保留主要字段): CREATE TABLE `store` (...
REPLACE works exactly like INSERT, except that if an old row in the table has the same value as a new row for a PRIMARY KEY or a UNIQUE index, the old row is deleted before the new row is inserted. 如果新插入行的主键或唯一键在表中已经存在,则会删除原有记录并插入新行;如果在表中不...
{SQLite3 ODBC Driver};Database=C:\sqlite\day_book.db" 'SQLITE的创建表的SQL语句 sqls = "CREATE TABLE 销售数据源(" & Join表头(arrString) & "PRIMARY KEY(商品id, name));" '开启对象 conn.Open Connstr '执行SQL语句生成表格 conn.Execute sqls '关闭对象 conn.Close MsgBox "Create Table ...